HOME >> BIOLOGY >> NEWS
DNA evidence suggests 3 types of elephants roam Africa

orphologically "indeterminate," or having both forest and savanna forms.

Their geographic isolation may have been caused by the desertification of a region in west Africa called the Dahomey Gap that separated the forests in central Africa from the forests in west Africa. Other potential barriers between the two regions include the Niger River Delta and the volcanic region of southwestern Cameroon. Based on their genetic data, the UCSD biologists believe that the west African populations have been isolated for as long as 2.4 million years.

The UCSD scientists note in their paper that while their genetic analyses of the mitochondrial, or maternally inherited, DNA sequences and nuclear microsatellite loci (short repetitive segments of DNA that show differences among populations and individuals) suggest the existence of "three recognizable taxa of African elephants," their results need to be confirmed before a formal taxonomic revision of the African elephants is proposed. That confirmation would require examination of additional nuclear DNA sequences which are inherited paternally as well as maternally.

"If the level of genetic differentiation between the three taxa identified here is confirmed to reflect several million years of divergence, it will be appropriate to treat them as species in recognition of their long independent evolutionary trajectories," they write in their paper.

Because nearly all of the African elephants in zoos are savanna elephants, the results do not have implications for elephants now in captivity. Zoos do not have forest elephants, largely because they are so elusive, and only three western elephants are now in captivity at the Abidjan Zoo in Cte d'Ivoire. However, the results have widespread implications for the management of all three types of wild African elephants. Although the ivory trade ban has slowed the slaughter of elephants, some countries have appealed for permission to resume the harvest.

"Only the sav
'"/>

Contact: Kim Mcdonald
kimmcdonald@ucsd.edu
858-534-7572
University of California - San Diego
12-Sep-2002


Page: 1 2 3 4

Related biology news :

1. New evidence of radiation risk in childhood leukaemia
2. Oldest evidence for processing of wild cereals: starch grains from barley, wheat, on grinding stone
3. Earliest evidence of hereditary genetic disorder discovered by Hebrew University researchers
4. Study finds first evidence COX-2 enzymes can regulate DNA damage
5. Researchers find evidence that sea turtles navigate with magnetic maps
6. Researchers report definitive evidence that HIV-AIDS is not from oral polio vaccine
7. Oldest known evidence of cat taming found in Cyprus, researchers report in Science
8. More evidence of major global extinctions
9. New evidence points to pollution as main cause of much coral reef destruction
10. New evidence suggests that monkey thought extinct still exists
11. Earliest evidence of humans affecting aquatic ecology in Canada, United States

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/16/2017)... 2017  Veratad Technologies, LLC ( www.veratad.com ), an ... identity verification solutions, announced today they will participate as ... 15 thru May 17, 2017, in Washington ... Center. Identity impacts the lives of ... quickly evolving digital world, defining identity is critical to ...
(Date:4/19/2017)... , April 19, 2017 ... its vendor landscape is marked by the presence of ... is however held by five major players - 3M ... these companies accounted for nearly 61% of the global ... leading companies in the global military biometrics market boast ...
(Date:4/13/2017)... PUNE, India , April 13, 2017 According ... Identity Proofing, Identity Authentication, Identity Analytics, Identity Administration, and Authorization), Service, Authentication ... by MarketsandMarkets™, the IAM Market is expected to grow from USD 14.30 ... Annual Growth Rate (CAGR) of 17.3%. ... ...
Breaking Biology News(10 mins):
(Date:8/23/2017)... ... August 23, 2017 , ... The Excelera network ... The network provides members nationally scaled infrastructure and support to help them develop ... agreements so members can provide continuity of care for their patients with complex ...
(Date:8/22/2017)... Worcester. MA (PRWEB) , ... August 22, 2017 ... ... a new service pipeline built upon patented KBioBox technology, the extended GUIDE-Seq ananlysis. ... open source GUIDE-Seq computation pipeline to be provide scientists with easy to understand ...
(Date:8/21/2017)... ... August 21, 2017 , ... Finalists ... awards recognize medical centers that have implemented innovative products, services, and technology over ... protocols, competitive advantages, financial impact/value, and market need. The applicants with the top ...
(Date:8/21/2017)... ... August 21, 2017 , ... The team at ... webinar, in which attendees will learn about the assembly and topological architecture of ... an overview of the development and validation of new high-quality recombinant monoclonal antibodies, ...
Breaking Biology Technology:
Cached News: